聚硅酸亚铁复合絮凝剂的制备及性能研究

摘要

以硅酸钠和硫酸亚铁为原料，制备了一种无机高分子型聚硅酸亚铁复合絮凝剂，考察了其絮凝条件：适用于处理碱性污水。并将制备的聚硅酸亚铁复合絮凝剂应用于含铬污水处理中，与聚硅酸铁及硫酸亚铁絮凝剂进行絮凝效果对比，结果表明聚硅酸亚铁絮凝剂对含铬污水处理效果较好，当絮凝剂投加量为15 mg/L时，除浊率达98%，Cr（Ⅵ）去除率达95%，总 Cr 去除率达88%。%A type of inorganic polymer flocculant,polysilicate-ferrous composite flocculant was prepared from ferrous sulfate and sodium silicate. Its flocculation conditions were investigated. It’s pointed out that the polysilicate-ferrous composite flocculant is appropriate for alkaline wastewater treatment. The prepared polysilicate-ferrous composite flocculant was used in chromium wastewater treatment and compared with polysilicate-ferric flocculant and ferrous sulfate flocculant. The results show that the polysilicate-ferrous composite flocculant has better effect for chromium wastewater treatment. When its dosage is 15 mg/L, the removal rate of turbidity is 98%, the removal rate of Cr ( ) isⅥ95%, the removal rate of total Cr is 88%.